This question might have been dealth with before but I would like to have a response since I'm new here and it is the first time I'm working with different map scales in a project. The maps include land use, land form, gas lines, electric lines, topography, etc. The scales range from 1:25000 to 1:1 000 000. Can anyone show me the best (most reliable and scientifically defendable) method to put them all in a database with scale at 1:25000? This is not merely for display or presentation purposes.